I am trying to get the apa6 package to work on Ubuntu 12.04 (Precise). In order to do so, I first installed TeX Live2012 from texlive-backports, and after some trying installed the following packages:
#install fonts
sudo apt-get install texlive-fonts-recommended texlive-fonts-extra
#install apa6/biblatex stuff
sudo apt-get install biblatex biblatex-dw
sudo apt-get install texlive-publishers
The sample document that is included in the apa6 package now almost compiles, the only thing that is not working is the citations. At every occurrence of \textcite or \parencite, it throws an error:
There are several problems at this line:
-'\parencite' not defined by citation style.
-Package biblatex Error: Command '\cite' undefined. A three-author paper \parencite
See also this screenshot (click to enlarge):
Am I missing some dependency?

apa6rely on its own BibTeX(!)apacitepackage for citations/bibliography? – jon Oct 12 '12 at 23:35biblatex, which is complaining in a way that suggests it hasn't been fed files it needs. – Paul Stanley Oct 13 '12 at 7:19